Vodacom service

Phoned them in December to ask how long a certain deal will be available. (R99 for 5 gig data for 24 months) Lady said she cant tell me as she does not know but deal wont change soon. I waited before i registered for the deal as i wanted to cancel my current contract 1st with FNB. So yesterday i wanted to registered for the deal just to see that they went up from R99 to R199??? Now how the hell does that work? I mean is their staff so uninformed that they can not tell customers that they will have a 100% increase in the new year?

I am very disappointed with Vodacom as i wanted that deal badly and now they wont get my service at all because of bad customer service and insanely high increase on their data packages.